So yesterday I get an email from a resident that lives behind me, about 200 yards through a wooded field. Says he was asking me nicely not to fly my drone over his house etc. Now long story short I'm never less then 150-200 feet when flying over he mentioned that he was asking nicely like if I didn't comply I'd have an issue. So tonight I'm coming towards my house at 300 feet in the air and 980 feet from home. All of a sudden the I lose control of the bird and it starts landing. I fight the controls get it over the wood but overshoot my property, at this point battery getting low...11% or so...finally I get it home and land with 6%. I immediately went in to review video. Bird is flying along and all of a sudden, turns to the left towards what looks to be a light shining up towards the drone. Then the video shows me fighting to get it back. I then look at my Healthy drone account and I find this. Check that signal error...something went wrong there and my question is what?